If you haven't noticed, the MSD Pro 600 CDI has been dominating high horsepower racing since its release. Racers like "Stevie Fast" Jackson have put its incredible spark energy output to good use and are racking up race wins. That's why Holley is pleased to introduce MSD's new high output ignition coils for the Pro 600 CDI system. Available in single or eight-pack configurations, these are finished in the classic MSD ignition red color. With the unrivaled output of the Pro 600 CDI, combined with these high output coils, everything from Pro Mod to Pulling Trucks can perform at a whole new level!